Jennifer starred in the MTV reality show alongside Heidi and Lauren Conrad and has since been living it up in Los Angeles with her boyfriend while also preparing to return to medical college.
Last night, Jen excitedly told fans how her man had popped the question by uploading a photograph of a huge sparkler on her left hand.
Alongside the picture, she gushed: "Just got engaged to the most amazing man in the world!!" Heidi then shared in Jen's happy news by retweeting the snap.
Meanwhile, there also (bizarrely) appears to be love in the air between The Hills' Stephanie Pratt and Made In Chelsea star Spencer Matthews.
At the weekend, after hanging out with the Chelsea Lothario in London, Stephanie tweeted Spencer saying: "DON'T CHEAT ON ME TONIGHT! @SpencerGeorgeM IM SERIOUS!"
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